DOI: 10.11799/ce201705004
Study on reasonable roadway location and surrounding rock control in isolated coal pillar
FAN Yu-qing
Abstract：In order to improve the efficiency of coal transportation and establish an efficient coal conveying system,the main transportation roadway in No.53 mining area of Xinjiang Bulake Coal Mine is to be arranged in the isolated coal pillar.To find the reasonable location for roadway,the surrounding rock structure and stress distribution law is analyzed firstly.According to FLAC3D simulation on stress,strain,displacement in coal pillar and roadway surrounding rock,as well as isolated coal pillar stability,under different roadway driving scheme,the roadway position is determined at 4m away from the 5401 goaf considering the field conditions.Besides,the anchoring force near the narrow coal pillar is guaranteed by the determination of the reasonable length of the anchor through pull out test.As a result,the deformation of surrounding rock is controlled,which is relatively large initially and turns stable later.
Keywords：isolated coal pillarroadway positionnumerical simulationsurrounding rock control
Publication Date：2017-01-01
Pages：4( 11-14 )